Rte. 224 & Rte. 23 Corridor Study, Scott County, VA

Davenport Transportation Consulting (DTC) provided the following scope of services for this project: 

Data Collection and Inventory - preparation of an inventory of existing roadway conditions at the selected intersections. There were thirteen critical intersections in the study area. DTC also coordinated with VDOT, TDOT, City of Kingsport, Kingsport MPO and Lenowisco PDC regarding existing traffic data and accident data, and relevant land use and zoning information for the study area and selected intersections. The following subtasks were included in this scope of work: 1) identification of the logical termini of the study area; 2) obtain and review of electronic data and reports that documented existing and planned conditions in the study area; 3) utilization of traffic count data collected in 2007 and 2008 from various traffic studies, VDOT, TDOT, City of Kingsport, Kingsport MPO and Lenowisco PDC where available; 4) collection of tube counts at five locations within the Route 224 study corridor and five locations within the Route 23 study corridor, including bi-directional 48-hour traffic volumes with vehicle classifications and speeds; 5) inventory of key elements of the existing pedestrian and bicycle infrastructure in the study corridor, noting deficiencies within these systems; 6) identification, characteristics and mapping of activity center/nodes and new developments along the study corridor; 7) verification and augmentation of collected field data through a review of field conditions in the study area, with field data summarized on study base mapping using scaled aerial photography; and 8) obtained a summary of the latest three years of available crash data from VDOT, TDOT and the City of Kingsport for crashes on Route 224 and Route 23. For the Data Collection and Inventory task, DTC had the following deliverables:

• Peak hour turning movement count summaries shown with traffic flow diagrams
• 24-hour tube count summaries, shown on the traffic flow diagrams
• Brief summary of pedestrian and bicycle inventory information
• Brief summary of existing transit service in the corridor
• Documentation of proposed mixed-use developments in the corridor
• Brief summary of crash data

Existing Conditions and Analysis - Based on the available and collected data DTC summarized existing conditions and deficiencies of the study corridor. Identified deficiencies included operational (i.e. level of service) and physical (i.e. non-standard features, bridge condition).  The existing conditions analysis provided a general review of baseline conditions, to provide a starting point for improvements with more of an emphasis placed on future conditions analysis and mitigation strategies. The following subtasks were included in this scope of work: 1) intersection level of service (LOS) analysis to reflect existing conditions in the study corridor, utilizing Synchro 7.0 model; 2) arterial link level of service (LOS) analysis on the two-lane or multi-lane module for the suburban and rural portions of the study corridor, utilizing Highway Capacity Software; 3) traffic safety review of the existing roadway infrastructure along Route 224 and Route 23 including capacity restraints; 4) review of current conditions for pedestrians and bicycles in the study corridor, evaluating network connectivity, accommodation, and general facility conditions; 5) summarizing and mapping of existing physical and operational conditions and deficiencies in the study corridor. For the Existing Conditions and Analysis task, DTC's deliverable was a technical memorandum that summarized the results of the existing conditions subtasks.